US2821954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adler
Assignee: —
•
Filing: —
•
Granted: 1958-02-04
•
Expires: 1975-02-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:18
CPC Classifications
G; G10; G10K; G10K5/00; G10K5/02; Y; Y10; Y10S; Y10S116/00; Y10S116/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US428381A
Cited
US1188564A
Cited
US1288382A
Cited
US1930029A
Cited
US2162901A
Cited
US2194559A
Cited
US2248459A
Cited
US2345472A
Cited
US2535680A
Cited
US2728902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |